How to disable the background on Freeciv-GTK3?

[happysmash27]

I have just upgraded from an older version of Freeciv to a much newer version and the text is barely readable due to the bright background:

2025-09-07-012022_1705x1278_scrot.png (762.88 KiB) Viewed 437 times

Is there any way to disable the background and just use the system theme for the background so that the text is readable?

[cazfi]

Does that light text (and dark buttons) come from a dark system theme?

Anyway, theme option is under Game -> Options -> Local Client -> Graphics -> Theme